Coin collectors from across the country are expected to pop their corks over a Napa vintner's $7.5 million vintage gold coin when it is displayed in Sacramento for the first time.

The finest know 1915-S Panama-Pacific International Exposition commemoration coins will be exhibited during the three days of the April Santa Clara Coin, Stamp & Collectibles Expo.

One of the first Gold Rush-era coins minted in San Francisco, a unique pioneer gold $20 piece minted by John G. Kellogg, will return to the Bay area for just the second time since it was made in 1854.

Five of the finest known surviving examples of early silver coins hand-struck in Colonial America and today worth a combined value of approximately $1 million will be displayed at the Santa Clara Coin, Stamp & Collectibles Expo.